The speed of light is defined as the speed with which a light photon travels in the vacuum. It is denoted by alphabet c and measure using SI unit m/s. Value of velocity of light or value of c is a constant at any part of the universe. This physical constant has multiple application at various disciplines of physics.
Speed of light
The velocity of the light in the vacuum is –
The speed of light c = 299792458 m/s ≅ 3 × 108 m/s
The velocity of light can be expressed in terms of mph or km/s. That is-
- The speed of light in mph 186,000 miles per hour
- The speed of light in air is 299792 km/s
Hope you have learnt the value of c or the value of the speed of light in vacuum along with units of velocity.
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